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Grad and classes with bounded expansion. I: Decompositions. (English) Zbl 1156.05056
Summary: We introduce classes of graphs with bounded expansion as a generalization of both proper minor closed classes and degree bounded classes. Such classes are based on a new invariant, the greatest reduced average density (grad) $$of G$$ with rank $$r, \nabla_r(G)$$. For these classes we prove the existence of several partition results such as the existence of low tree-width and low tree-depth colorings. This generalizes and simplifies several earlier results (obtained for minor closed classes).

##### MSC:
 05C83 Graph minors 05C75 Structural characterization of families of graphs
PIGALE
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##### References:
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